Kids Size Finder

Stop guessing your child's clothing size.

Kids Clothes Size Finder tells you the exact size to buy across 36+ major brands — before you add to cart. No more returns. No more buying two sizes and sending one back.

Made for online shopping

When you're shopping for kids' clothes online you can't try anything on. Kids Clothes Size Finder solves that. Enter your child's measurements, pick a brand, and get the right size instantly — whether you're buying from H&M, Zara, Carter's, Gap Kids, Next, Cat & Jack, Tu or any of our 36+ verified brands.

Know how long it will fit

Every size recommendation includes a wear time prediction — so you know if that H&M jacket will last through winter or if you should size up. Stop buying clothes your child outgrows in a month.

Buy ahead with confidence

Shopping for Christmas? A birthday gift? Enter a future date and we'll recommend the right size for when your child will actually wear it. No more gifting clothes that are already too small.

Save your child's profile

Add your child's measurements once and we remember them. Every time you shop, their profile is ready — just pick a brand and go. Add multiple children and switch between them instantly.

Compare brands before you decide

Can't decide between Zara and H&M? Swipe to compare size recommendations and wear time across brands side by side. Find the best fit and the best value before you buy.
Verified data. Not guesswork.

Every size chart in Kids Clothes Size Finder is verified from official brand sources. We don't guess. We don't use AI to generate measurements. We cross-reference against official size charts so you can trust the recommendation.

Free. No ads. No subscription.

Kids Clothes Size Finder is completely free. No ads, no paywalls, no subscription. Just accurate size recommendations when you need them.

Brands included:

H&M, Zara, Carter's, Old Navy, Gap Kids, Next, Tu (Sainsbury's), Tesco F&F, Cat & Jack, Marks & Spencer, Nike Kids, Adidas Kids, Primark, Uniqlo, Name It, Lindex, KappAhl, Polarn O. Pyret, Wonder Nation, Amazon Essentials and many more.